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| CodeSonar® 9.0p0 Hot Tips | CONFIDENTIAL | CodeSecure Inc |
双曲線余弦関数ライブラリ実行時の引数の値が大きすぎるため、算術オーバーフローが発生します。
| クラス名 | cosh on High Number | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 日本語クラス名 | 大きすぎる双曲線余弦関数の引数値 | ||||||||||||||||||||||||||||||
| クラス分類 | 信頼性 (reliability) | ||||||||||||||||||||||||||||||
| ニーモニック | MATH.RANGE.COSH.TOOHIGH | ||||||||||||||||||||||||||||||
| カテゴリー |
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| 対応言語 | C および C++ で利用可能です。 |
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| 有効/無効設定 | このワーニングクラスのチェックはデフォルトで有効になっています。チェックを無効にするにはプロジェクト設定ファイル
（configuration file）に以下の WARNING_FILTER ルールを追加してください。
WARNING_FILTER += discard class="cosh on High Number" |
CodeSonar ships with library models that allow it to functions such as libm cosh() that compute a hyperbolic cosine. If one of these functions is called with a value greater than 710.5 in the input parameter position, a warning will be issued.
If you have created a custom library model for some function f() in terms of one of these existing models, calls to f() will also be capable of triggering cosh on High Number warnings.
English (en)
#include <math.h>
double call_cosh(double ind){
double a = cosh(1); /* ok */
double b = cosh(710.5); /* ok */
double c = cosh((float)(7.105f*100)); /* 'cosh on High Number' warning issued here:
* because of floating point imprecision, 7.105f*100 > 710.5
*/
double d = cosh(711); /* 'cosh on High Number' warning issued here */
double e = cosh(ind); /* EVIDENCED ONLY: 'cosh on High Number' warning issued here
* if CodeSonar has evidence that a negative value is passed to
* call_cosh().
*/
return a+b+c+d+e;
}
設定ファイルの以下のパラメータがこのワーニングクラスのチェックに影響します。